Franz Torsten, Krebs Peter
Institute for Urban Water Management, Dresden University of Technology, D-01062 Dresden, Germany.
Water Sci Technol. 2008;57(9):1429-35. doi: 10.2166/wst.2008.302.
The cost-oriented and sustainable operation of sewer systems requires a comprehensive knowledge about the infiltration situation in the catchment. Owing to the high expenditures for infiltration measurements a reliable transfer of measurement results to other sewer sections would be highly beneficial. Assuming a functional relationship between sewer characteristics and infiltration rates can be identified, such a transfer can be realised by means of classification techniques. In this paper a method is introduced which is based on discriminant analysis and which allows for a transfer of measurement results to similar sub-catchments. The method was applied using two data sets with measured or virtual infiltration rates. It yields acceptable results as a total fraction of 50% to 75% of the investigated sub-catchments was assigned correctly. Furthermore, additional information to assess the results was provided. The quality of the transfer results depends strongly on the homogeneity of the considered sub-catchments. Due to this restriction the practical applicability of the method is restricted. Nevertheless, it might be used as a screening procedure for planning of effective detailed infiltration investigations.
排水系统以成本为导向的可持续运营需要全面了解集水区的渗漏情况。由于渗漏测量成本高昂，将测量结果可靠地转移到其他排水管道部分将非常有益。假设能够识别出排水管道特征与渗漏率之间的函数关系，那么这种转移可以通过分类技术来实现。本文介绍了一种基于判别分析的方法，该方法允许将测量结果转移到相似的子集水区。该方法使用了两个具有实测或虚拟渗漏率的数据集进行应用。结果显示，50%至75%的被调查子集水区被正确分类，得出了可接受的结果。此外，还提供了评估结果的额外信息。转移结果的质量在很大程度上取决于所考虑子集水区的同质性。由于这一限制，该方法的实际适用性受到限制。尽管如此，它仍可作为规划有效的详细渗漏调查的筛选程序。
